iPhone 4S

• The model number on the back cover is:
  A1387 on the iPhone 4S
• The front and back surfaces are flat and made of glass.
• There is a stainless steel band around the edges.
• The volume up and down buttons are marked with a *quot;+*quot; and *quot;-*quot; sign.
• There is micro-SIM tray on the right side that holds a micro-SIM card.

iPhone 4

• The model number on the back cover is:
  A1249 on the iPhone 4 (CDMA model)
  A1332 on the iPhone 4 (GSM model)
• The front and back surfaces are flat and made of glass.
• There is a stainless steel band around the edges.
• The volume up and down buttons are marked with a *quot;+*quot; and *quot;-*quot; sign.
• The GSM model has a micro-SIM tray on the right side that holds a micro-SIM card.
• The CDMA model does not have a SIM tray.